3074 - 8-Channel PC Controlled Relay Board

This PC printer (parallel) port relay board provides independently programmable real-time control for each of the eight onboard mains rated relays.

Relay outputs can be used to automatically turn On/Off lights, motors & other devices around the home, office, laboratory or factory. The software interface is compatible with Windows 7 (32-bit)/Vista/XP/ME/2000/NT/9x and allows you to program and save an infinite number of On/Off sequences. Alternatively, you can write your own software with a DLL from http://www.logix4u.cjb.net/.

NB If this board is powered up and connected to the computer, all of the relays will momentarily turn on when the PC first boots up. If this is a problem, please look at our 8-Channel Serial Port Isolated IO Relay Controller instead.

• Can be used with any PC parallel port on a 286 upward (remember those?)
• Each channel has a relay output
• LED relay status indicator for each relay
• For a BOXED version of the project see Order Code 3165
• NB If this board is powered up and connected to the computer, all of the relays will momentarily turn on when the PC first boots up. If this is a problem, please look at our 8-Channel Serial Port Isolated IO Relay Controller instead.

Technical Specifications
Power	Regulated 12Vdc (Order Code PSU446 is suitable)
Current Consumption	300mA max (40mA standby plus ~30mA per active relay)
Outputs	8 x SPDT Relays
Maximum Output Load (Resistive)	Up to 240Vac or 28Vdc @ 5 Amps max. per relay (Relay Datasheet)
Output Connections	NO, NC, C (Relay FAQ)
Computer Interface	Parallel port
Dimensions	70 x 200 x 25 mm
Connections	Power: 5.5 x 2.5mm DC socket Relays: Screw terminal blocks Computer: Male DB25 connector
Product Format	SELF-ASSEMBLY Electronic Kit (KT ) or PRE-ASSEMBLED Electronic Module (AS) more
Documentation	User Manual
Software	Windows Software Interface

Software Interface

Our new Windows interface has greatly improved features and allows almost limitless 24/7 programmability. Programming sequences can be saved to disk for reuse. Compatible with Windows 3.1 to Vista. Download the New Windows Software here.

We also have a set of DOS-based utilities that allow you to write batch files to control the relay board to your requirements. A sample test program is provided. The older version Windows-based Program written especially for this project is also available. A Linux-based version is also available for download.
 

Options

• Can be used with our optional Parallel Input RF Data Link Transmitter (Order Code 3175) and Parallel Output RF Data Link Receiver (Order Code 3176)

• Power Supply: 12Vdc, 500mA minimum (Order Code PSU446)
• M-F Parallel Port Lead (Order Code LDC136)